Search results
Results from the WOW.Com Content Network
Quantity (common name/s) (Common) symbol/s Defining equation SI unit Dimension Temperature gradient: No standard symbol K⋅m −1: ΘL −1: Thermal conduction rate, thermal current, thermal/heat flux, thermal power transfer
A, F: J Helmholtz free entropy: Φ: J/K Internal energy: U: J Specific internal energy: u: J/kg Internal pressure: π T: Pa Mass: m: kg Particle number: N i – Chemical potential μ i: Pressure: p: Pa Volume V: Temperature: T: K Entropy S: Thermal conductivity: k: W/(m·K) Thermal diffusivity: α: m 2 /s Thermal expansion (linear) α L: K −1 ...
where S is the entropy of the system, k B is the Boltzmann constant, and Ω the number of microstates. At absolute zero there is only 1 microstate possible ( Ω = 1 as all the atoms are identical for a pure substance, and as a result all orders are identical as there is only one combination) and ln ( 1 ) = 0 {\displaystyle \ln(1)=0} .
An enthalpy–entropy chart, also known as the H–S chart or Mollier diagram, plots the total heat against entropy, [1] describing the enthalpy of a thermodynamic system. [2] A typical chart covers a pressure range of 0.01–1000 bar , and temperatures up to 800 degrees Celsius . [ 3 ]
1.438 776 877... × 10 −2 m⋅K: 0 [12] [e] Wien wavelength displacement law constant: 2.897 771 955... × 10 −3 m⋅K: 0 [13] ′ [f] Wien frequency displacement law constant: 5.878 925 757... × 10 10 Hz⋅K −1: 0 [14] Wien entropy displacement law constant 3.002 916 077... × 10 −3 m⋅K: 0
J.A. Dean (ed), Lange's Handbook of Chemistry (15th Edition), McGraw-Hill, 1999; Section 6, Thermodynamic Properties; Table 6.4, Heats of Fusion, Vaporization, and Sublimation and Specific Heat at Various Temperatures of the Elements and Inorganic Compounds
In this case, K eq can be defined as ratio of B to C rather than the equilibrium constant. When B / C > 1, B is the favored product, and the data on the Van 't Hoff plot will be in the positive region. When B / C < 1, C is the favored product, and the data on the Van 't Hoff plot will be in the negative region.
Similar to the Kelvin scale, which was first proposed in 1848, [1] zero on the Rankine scale is absolute zero, but a temperature difference of one Rankine degree (°R or °Ra) is defined as equal to one Fahrenheit degree, rather than the Celsius degree used on the Kelvin scale.